221324031240 has 64 divisors (see below), whose sum is σ = 715046875200. Its totient is φ = 54479761152.

The previous prime is 221324031209. The next prime is 221324031251. The reversal of 221324031240 is 42130423122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 221324031240.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70935630 + ... + 70938749.

It is an arithmetic number, because the mean of its divisors is an integer number (11172607425).

Almost surely, 2^221324031240 is an apocalyptic number.

221324031240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221324031240 is an abundant number, since it is smaller than the sum of its proper divisors (493722843960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221324031240 is a wasteful number, since it uses less digits than its factorization.

221324031240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141874406 (or 141874402 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221324031240 its reverse (42130423122), we get a palindrome (263454454362).

The spelling of 221324031240 in words is "two hundred twenty-one billion, three hundred twenty-four million, thirty-one thousand, two hundred forty".